Wire drawing mechanism



April 18, 1933.

A. T. YUNGMAN l WIRE DRAWING HECHANISH 2 sheets-sheet 1 Filed Feb. '7, 1929 INVENTOR.

A TTORNEYS April 18, 1933.

A. T. YUNGMAN WIRE DRAWING IECHANISM Filed..y Feb. 7, 1929 2 'Sheets-Sheet 2 A ToRNEY Patented Apr. 18, 1933 'UNITED STATES PATENT ori-*IcaA ALFRED T. YUNGMAN, on AKRON, oHIo, AssIGNoR To THE VAUGHN MACHINERY com- PANY; or CUYAHOGA FALLS, oHIo, A CORPORATION or* omo WIRE DRAWING MRCHANISM Application led February 7, 1929. Serial No. 338,142.

` The present invention relates, as indicated, to a wire'drawmg mechanism, and more particularly to that type of wire drawing bench which comprises a plurality of blocks carrying dies and drawing drums. The primary object of the invention is to increase thefleX- ibility of use of such a bench. To the accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawings and the following description set forth in detail certain mecha- Y nism embodying the invention, such disclosed'means constituting, however, but one of various mechanical forms in whichthe principle ofthe invention may be used. In said annexed drawings: Fig. 1 is a side elevation of a drawing bench of the type described; and Fig. 2 is a plan view thereof.

According to my invention, the drawing bench comprises one or more bottom cases or housings 2 and 3, each of which is provided with a cover section as at 4 and 4', the joints between the housings and covers being on the center lines of the bearingsv for transverse shafts later to be described. TheV casing 2 mounts a drum 5 and a gear 6 upon a transverse shaft 7, said gear 6 meshing with a pinion 8 carried `upon a parallel shaft 9 mounted in said above-mentioned bearing. Another drum 10 and a gear 11 of smaller pitch than said gear 6 are mounted in saidhousing 2 upon a Shaft 12 parallel with, and

in the same horizontal plane with, said shaft 7, said gear 11 also meshing with said pinion 8. The drums 5 and 10 are of equal 'diam- Yeters, Vand consequently it will be seen that the drum Vl() will draw a greater length of wire in a given period than will the drum 5.

In the bearing provided between the housing 3 and its cover 4. there is mounted a shaft 14 similar to the shaft 9, and said shaft and 16 carried upon shafts 17 and 18 which also carry drums 19 and 20, allot the above being similar to the arrangement in the housinO 2.

motor 21 is mounted adjacent saidv hous- `or-three times about the drum 5, threaded carries a pinion 13 meshing with gears 15,

ings, and the spindle 22 thereofis connected through alexible unit 23 to a Shaft 24 carrying a worm 25 within a casin 26, said worm meshing with a worm w eel V(not shown) on the shaft 9. The shaft 24 continues beyond the casing 26 and is secured `through a flexible coupling 27 to the Shaft .36,and 37. Suitable mechanism indicated generally at 38 is provided for rotating said dies. It will be understood that the wire is threaded through the die 33, wrapped two through the d-ie34, wrapped about the drum 10, threaded through the die 35, 4wrapped about the drum 19, threaded through the die 36, wrapped about the drum 20, threaded through the die 37, and drawn away from the machine by suitable mechanism and wound.

vEach die reduces the crosssectional area of the wire, and it may be supposed, forthe purposesof this discussion, that the die 33 brings the diameter ofthe wire to one-eighth of an inch, the die 34 brings it to seven-siXty-- fourths of an inch, the die 35 bringsit to three-th'irty-secon'ds` of an inch, the die 36 brings it to'ive-siXty-fourths of an inch,and the die 37 brings it to one-sixteenth of an inch. A trough for drawinglubricant is illustrated at 45.

According to usual practise. the winding mechanism above mentioned whichalso usually acts asthe means for drawing the wire through the last die 37, is inflexibly'intergeared with the drums 5, 10, 19. and 20. Where such is 'the`.,case, however, it .Willbe impossible to draw efiiciently on the machine illsutrated. a wire having a cross-sectional diameter of.. Say. three-thirtyfseconds of an inch, since the winding mechanism. .geared v the right end of the machine,A a separate draivingbloclrunit 39 comprising a 'drum orV reel 40 mountediupon a vertical shaft 41,said shaft 41 carrying a worm wheel 42 cooperat ing with a worm 43 upon the spindle of an adjustablejspeed motor 44. Obviously, with this construction, as the finishedsize of wire increases, the power. required w1ll increase wire. drawing the larger sizes as in above example,

v the speed ofthenishing 'block can be reduced to correspond with that of any of the j tmctly claim as my inventlon:

drums and the power requiredthereby limited to a figure no greater than the amount necessary to draw the smaller wire atfthe speed of the last drum. A machine of ordil* vnary fiXed-speed-windup construction del It will be'clearlyseen signed to producey a certain size wire at the speed of the last drum will nothavespower 'enough todraw any larger sizes. TheA same machine with my improved adjustable speedl 'windup will be able to draw any size down to that of the original rod without overloading. The savings inv machine cost due to this feature are obvious. i

Vth'at,thr'ough this 'Y provision, I have `made it possible'to usel the "herein-'disclosed machine to draw wireto any diameter from, say, one-eighth of aninch to one-sixteenth ofl f' an inch, using y.gears and Ymotive power no larger than required to draw one-'sixteenthineh from cne-eighthineh in Vfour drafts onfa machine withv intermediate drums and finishing drum -intergeared Thus if it is desired to draw wire to a sec- Y. tional diameter of one-eighth of an finch, l said wire is vthreaded through the die 33' and y carried directly-to the drum 40. The motor 44 isthen energized vto .rotate the drum 40 y at'the proper speed to' draw `'wire through the "f5," threaded through? the dieV 34, Ywrapped` a about Vthe drum 10, threaded throughA the die diey 33alone. If, on the other hand,-itis del Vsired to draw wire to three-thirty-seconds of an inchL diameter, the wire isthreaded through'the die 33, wrapped about the drum 35Y and their carried to thefdrum40f I v v The motors 21 and 44 being energized, and

vthemotor v44 being driven somewhat faster than in the previous case, the wire may be.

drawn through the dies 33, 34, and 35 to obf tain the desired reduction. kFrom the above description it will be'apparent that, kby varying thespeed .at which the motorl 44 rotates the drum 40, it will be possible to draw V,wire

through any selected number of dies mounted V'up'onthe described machine, and that-said machine, with the provision of the separate drawing unit l39 is infinitely more fiexible in proportion to the increased area of the With my improved design, when- While I- have disclosed a machine including a finishing drum driven by a separate motor,.it is to be understood that I might alternatively use a finishing drum driven from the main drive motor 21 through the medium of'change-speed gears or ofa variable speed drive such as, Yfor instance, a 'Reeves unit.

' Other modes of applying the principle of my invention may be employed instead of the -one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of; such :stated means be employed. f l v VI therefore particularlypoint out 'and disl V1. The combination ,with a Vdrawing bench comprising a pair offtransverse shafts, a drum on each of said shafts, a gear on each of said Y shafts, said vgears having didere'nt pitch j diameters, a shaft arranged intermediate said transverse shafts and carrying a gear in mesh with said transverse shaft gears,a worm wheel on sa1d mtermedlate shaft, a worm mounted'for cooperation with said worm wheel and means for driving said worm, ofea separate, self-contained winding unit mount-v ed at one end of sa1d bench and comprising .a `drum andan adjustable speed motor for .drivingthesame 2 In an apparatus of scribed, a means for selectively driving a series of drawing drums comprising a pair' of transverse shafts, a drum on each ofl said shaft arranged intermediate said transverse shafts andv carrying a gear in mesh with said transverse Vshaft gears, a worm wheel on 'said intermediate shaft, a worm mounted for co4 operation with said worm wheel', and means for driving said worm. Y 3. Incombinatioma multiple-drum drawthe "characterjde-Y shafts, a gear on each of said shafts, said gears having different pitch diameters, a 105V ing bench includingr a plurality of dies, ai.

drawing drum for each die, means associated with said drums adapted to drive them at speeds having fixed predetermined 'differbeing separate and independent from that of sa1d drawing drums, in order that saidwind- Ventials, a finishing die, and a windingunit Y i having` a winding drumthereon adapted to'y fdraw a wire through-said finishing die at a speed adjustable to correspondto the number of dies in use, the drive for said winding drum V ing drum may be driven inrcombination with any number less than the-total number of" provide a multiple purpose'V drawing drums to drawing machine. A

`Signed by me thislst day of January,

` j ALFRED T. YUNGMAN. j 

